Orszag Tang vortex - Kinetic study of a turbulent plasma
- Department of Physics and Astronomy, 217 Sharp Lab, University of Delaware, Newark, Delaware 19716 (United States)
Kinetic evolution of the Orszag-Tang vortex is studied using collisionless hybrid simulations based on particle in cell ions and fluid electrons. In magnetohydrodynamics (MHD) this configuration leads rapidly to broadband turbulence. An earlier study estimated the dissipation in the system. A comparison of MHD and hybrid simulations showed similar behavior at large scales but substantial differences at small scales. The hybrid magnetic energy spectrum shows a break at the scale where Hall term in the Ohm's law becomes important. The protons heat perpendicularly and most of the energy is dissipated through magnetic interactions. Here, the space time structure of the system is studied using frequency-wavenumber (k-omega) decomposition. No clear resonances appear, ruling out the cyclotron resonances as a likely candidate for the perpendicular heating. The only distinguishable wave modes present, which constitute a small percentage of total energy, are magnetosonic modes.
- OSTI ID:
- 21371721
- Journal Information:
- AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1216; ISSN APCPCS; ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BARYONS
CHARGED PARTICLES
COMPARATIVE EVALUATIONS
COMPUTERIZED SIMULATION
CYCLOTRON RESONANCE
ELECTRONS
ELEMENTARY PARTICLES
ENERGY
ENERGY SPECTRA
EVALUATION
FERMIONS
FLUID MECHANICS
HADRONS
HEAT
HYDRODYNAMICS
IONS
LEPTONS
MAGNETOHYDRODYNAMICS
MECHANICS
NUCLEONS
OHM LAW
PLASMA
PLASMA SIMULATION
PROTONS
RESONANCE
SIMULATION
SPECTRA
TURBULENCE
VORTICES